Spring WebFlux example application: notice board

#reactor #spring #webflux #springsecurity

Objective

I wrote this application to explain the mechanism of different components of the Spring framework.

Function

Display notice on stated time
Approval before display
Multi language UI

Main component used

Project Reactor 3.7.X
Spring Boot 3.4.X
Spring WebFlux 6.2.X with thymeleaf 3.1.X
Spring Security 6.4.X
Spring R2DBC 6.2.X
Dozer 7.0.X
netty 4.1.X

Database

By default, data is stored in an embedded H2 database. Schema and data is imported when the application starts and all data will be lost after application shutdown.

MySQL database is also supported. In order to switch to MySQL database, first to modify the following properties located in application.properties file.

spring.r2dbc.url=r2dbc:mysql://localhost:3306/database-name
spring.r2dbc.username=root
spring.r2dbc.password=password

Then deactivate 'db-h2' and activate 'db-mysql' Maven profiles when starting the application. And activate 'init-db' profiles also when starting the application at the first time.

Prerequisite

Java SE Development Kit 17 or above
Internet connection

Compile and run

Apache Maven wrapper is included, no additional package manager is necessary.

Compile (On Microsoft Windows)

mvnw package

Run (On Microsoft Windows)

mvnw spring-boot:run

Press Ctrl+C to stop.

Maven profiles

ID	Activated by default	Function
db-h2	Yes	Using embedded H2 database
db-mysql	No	Using MySQL database
init-db	Yes	Import schema and initial data into database

Account

Username	Password	Authorities
user1	user1	USER
user2	user2	USER
admin	admin	USER, ADMIN

Source code

You may download source code from here.

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